[rossiskier78]

I've looked and I can't find the answer but I may just be blind. What is the size of the Body Mount Bolts on a 2011 GMC Sierra. Looking to make sure I have the correct tools for install of step rails....Thanks Jon

 

[mmrkustoms]

21mm if I remember

 

[rossiskier78]

21mm if I remember

Thanks for the reply

 

[mmrkustoms]

Thanks for the reply

no problem

sorry to bump a old post didn't see the date my bad